US5520474A - Adjustable coupling - Google Patents

Adjustable coupling Download PDF

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Publication number
US5520474A
US5520474A US08/324,463 US32446394A US5520474A US 5520474 A US5520474 A US 5520474A US 32446394 A US32446394 A US 32446394A US 5520474 A US5520474 A US 5520474A
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United States
Prior art keywords
axle
cam
movable
toggle
longitudinal shaft
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Expired - Fee Related
Application number
US08/324,463
Inventor
Yang-Ting Liu
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Individual
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Publication of US5520474A publication Critical patent/US5520474A/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C11/00—Pivots; Pivotal connections
    • F16C11/04—Pivotal connections
    • F16C11/10—Arrangements for locking
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B7/00—Connections of rods or tubes, e.g. of non-circular section, mutually, including resilient connections
    • F16B7/04—Clamping or clipping connections
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T403/00—Joints and connections
    • Y10T403/32—Articulated members
    • Y10T403/32254—Lockable at fixed position
    • Y10T403/32262—At selected angle
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T403/00—Joints and connections
    • Y10T403/32—Articulated members
    • Y10T403/32254—Lockable at fixed position
    • Y10T403/32262—At selected angle
    • Y10T403/32319—At selected angle including pivot stud
    • Y10T403/32327—At selected angle including pivot stud including radially spaced detent or latch component
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T403/00—Joints and connections
    • Y10T403/32—Articulated members
    • Y10T403/32254—Lockable at fixed position
    • Y10T403/32262—At selected angle
    • Y10T403/32319—At selected angle including pivot stud
    • Y10T403/32368—At selected angle including pivot stud including radial interengaging tongue and slot or serrations
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T403/00—Joints and connections
    • Y10T403/32—Articulated members
    • Y10T403/32254—Lockable at fixed position
    • Y10T403/32262—At selected angle
    • Y10T403/32418—Plural distinct positions

Definitions

  • the present invention relates to couplings, and relates more particularly to an adjustable coupling for connecting a plurality of frame rods together permitting them to be adjustably retained at desired angular positions.
  • Adjustable couplings are intensively used in folding hand trucks and deck chairs to couple frame rods together permitting them to be adjusted relative to one another.
  • the disadvantage of these adjustable couplings is that they allow the coupled frame rods to be turned between the operative and collapsed positions or adjusted at limited angles.
  • an adjustable coupling comprised of an axle, a fixed toggle mounted around the axle to hold a first frame rod, two movable toggles turned about the axle to hold a second frame rod and a third frame rod respectively, two locating plates mounted around the axle and prohibited from rotary motion relative to the axle and coupled with the movable toggles through a respective toothed joint, two cam plate holders fixed to the axle at two opposite ends, and two cam plates mounted around the axle and engaged with the cam plate holders.
  • FIG. 1 is an exploded view of an adjustable coupling according to the present invention
  • FIG. 2 is a longitudinal view in section of the adjustable coupling of FIG. 1 when installed;
  • FIG. 3 is an elevational view of the adjustable coupling shown in FIG. 1;
  • FIG. 4 is an end view in section of the adjustable coupling shown in FIG. 2.
  • an adjustable coupling in accordance with the present invention is generally comprised of a first movable toggle 11, a second movable toggle 12, two locating members 13, two coiled springs 14, a first mushroom cam 15, a second mushroom cam 15A, two cam holders 16, and a fixed toggle 19. These elements are respectively mounted around an axle 2 and stopped in place by a headed screw bolt 17 and a screw pin 18.
  • the axle 2 is polygonal bar having a first screw hole 23 axially at one end 21 thereof, and a second screw hole 22 spaced from the first screw hole 23 and disposed in a radial direction.
  • the fixed toggle 19 comprises a circular shaft 192 having a polygonal bore 191, and an axle housing 193 perpendicularly spaced from the circular shaft 192 for receiving a first frame rod 41.
  • the first movable toggle 11 comprises a circular axial hole 112, which receives one end of the circular shaft 192 of the fixed toggle 19, a crown gear 111 around the circular center through hole 112 at an outer end, and an axle housing 113 disposed in a radial direction for receiving a second frame rod 42.
  • the second movable toggle 12 comprises a circular axial hole 122, which receives an opposite end of the circular shaft 192, a crown gear 121 (not shown) around the circular center through hole 122 at an outer end, and an axle housing 123 disposed in a radial direction for receiving a third frame rod 43.
  • the locating members 13 are respectively coupled to the movable toggles 11 and 12, each having a crown gear 131 meshed with the crown gears 111 and 121 of the movable toggles 11 and 12 and a polygonal center through hole 132 fitting the axle 2.
  • the coiled springs 14 are respectively mounted around the axle 2 and stopped between the locating members 13 and the movable toggles 11 and 12.
  • the cam plate holders 16 are respectively mounted around the axle 2 at opposite ends, of the axle 2 each having a polygonal center through hole 161, which fits the axle 2, and a projecting portion 162 at an inner side.
  • the first and second mushroom cams 15 and 15A are respectively rotated around the circular shaft 192 of the fixed toggle 19 and disposed between the locating members 13 and the cam holders 16 and received in the cam holders 16, each having a circular center through hole 153, which receive the circular shaft 192 of the fixed toggle 19, a projecting portion 151 respectively axially stopped against the projecting portions 162 of the cam holders 16, and a handle 152 respectively extended out of the cam holders 16.
  • the headed screw bolt 17 and the screw pin 18 are respectively threaded into the first and second screw holes 23 and 22 on the axle 2 to stop all the members in place.
  • the mushroom cam 15 and 15A are respectively turned back to let the projecting portions 151 of the mushroom cams 15 and 15A stop against the projecting portions 162 of the cam holders 16 axially, and therefore the locating members 13 are forced to engage with the crown gears 111 and 121 of the movable toggles 11 and 12 again.

Abstract

An adjustable coupling including an axle, a fixed toggle mounted around the axle to hold a first frame rod, two movable toggles turned about the axle to hold a second frame rod and a third frame rod respectively, two locating plates mounted around the axle and prohibited from rotary motion relative to the axle and coupled with the movable toggles through a respective toothed joint, two cam holders fixed to the axle at two opposite ends, and two mushroom cam mounted around the axle and engaged with the cam holders, when the mushroom cams are fully received into the cam holders, the movable toggles can be disengaged from the locating plates and turned relative to the axle to adjust the angular positions of the second and third frame rods relative to the axle.

Description

BACKGROUND OF THE INVENTION
The present invention relates to couplings, and relates more particularly to an adjustable coupling for connecting a plurality of frame rods together permitting them to be adjustably retained at desired angular positions.
Adjustable couplings are intensively used in folding hand trucks and deck chairs to couple frame rods together permitting them to be adjusted relative to one another. The disadvantage of these adjustable couplings is that they allow the coupled frame rods to be turned between the operative and collapsed positions or adjusted at limited angles.
SUMMARY OF THE INVENTION
The present invention has been accomplished to provide an adjustable coupling which permits the coupled frame rods to be respectively adjusted through 360° angle. To achieve this object, there is provided an adjustable coupling comprised of an axle, a fixed toggle mounted around the axle to hold a first frame rod, two movable toggles turned about the axle to hold a second frame rod and a third frame rod respectively, two locating plates mounted around the axle and prohibited from rotary motion relative to the axle and coupled with the movable toggles through a respective toothed joint, two cam plate holders fixed to the axle at two opposite ends, and two cam plates mounted around the axle and engaged with the cam plate holders. When the cam plates are disengaged from the cam plate holders, the movable toggles can be disengaged from the locating plates and turned relative to the axle to adjust the angular positions of the second and third frame rods relative to the axle.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is an exploded view of an adjustable coupling according to the present invention;
FIG. 2 is a longitudinal view in section of the adjustable coupling of FIG. 1 when installed;
FIG. 3 is an elevational view of the adjustable coupling shown in FIG. 1;
FIG. 4 is an end view in section of the adjustable coupling shown in FIG. 2.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT
Referring to the annexed drawings in detail, an adjustable coupling in accordance with the present invention is generally comprised of a first movable toggle 11, a second movable toggle 12, two locating members 13, two coiled springs 14, a first mushroom cam 15, a second mushroom cam 15A, two cam holders 16, and a fixed toggle 19. These elements are respectively mounted around an axle 2 and stopped in place by a headed screw bolt 17 and a screw pin 18.
The axle 2 is polygonal bar having a first screw hole 23 axially at one end 21 thereof, and a second screw hole 22 spaced from the first screw hole 23 and disposed in a radial direction. The fixed toggle 19 comprises a circular shaft 192 having a polygonal bore 191, and an axle housing 193 perpendicularly spaced from the circular shaft 192 for receiving a first frame rod 41. The first movable toggle 11 comprises a circular axial hole 112, which receives one end of the circular shaft 192 of the fixed toggle 19, a crown gear 111 around the circular center through hole 112 at an outer end, and an axle housing 113 disposed in a radial direction for receiving a second frame rod 42. The second movable toggle 12 comprises a circular axial hole 122, which receives an opposite end of the circular shaft 192, a crown gear 121 (not shown) around the circular center through hole 122 at an outer end, and an axle housing 123 disposed in a radial direction for receiving a third frame rod 43. The locating members 13 are respectively coupled to the movable toggles 11 and 12, each having a crown gear 131 meshed with the crown gears 111 and 121 of the movable toggles 11 and 12 and a polygonal center through hole 132 fitting the axle 2. The coiled springs 14 are respectively mounted around the axle 2 and stopped between the locating members 13 and the movable toggles 11 and 12. The cam plate holders 16 are respectively mounted around the axle 2 at opposite ends, of the axle 2 each having a polygonal center through hole 161, which fits the axle 2, and a projecting portion 162 at an inner side. The first and second mushroom cams 15 and 15A are respectively rotated around the circular shaft 192 of the fixed toggle 19 and disposed between the locating members 13 and the cam holders 16 and received in the cam holders 16, each having a circular center through hole 153, which receive the circular shaft 192 of the fixed toggle 19, a projecting portion 151 respectively axially stopped against the projecting portions 162 of the cam holders 16, and a handle 152 respectively extended out of the cam holders 16. When all members are mounted around the axle 2, the headed screw bolt 17 and the screw pin 18 are respectively threaded into the first and second screw holes 23 and 22 on the axle 2 to stop all the members in place.
Referring to FIGS. 2, 3, and 4 again, when the mushroom cams 15 and 15A are turned through the handles 152 and 152A to move the projecting portions 151 of the cam 15 and 15A sideways away from the projecting portions 162 of the cam holders 16, the coiled springs 14 are released from the pressure to push the crown gears 131 of the locating members 13 away from the crown gears 111 and 121 of the movable toggles 11 and 12, and therefore the movable toggles 11 and 12 can be rotated about the circular shaft 182 of the fixed toggle 19 to change the angular positions of the second and third frame rods 42 and 43 relative to the first frame rod 41. After the adjustment, the mushroom cam 15 and 15A are respectively turned back to let the projecting portions 151 of the mushroom cams 15 and 15A stop against the projecting portions 162 of the cam holders 16 axially, and therefore the locating members 13 are forced to engage with the crown gears 111 and 121 of the movable toggles 11 and 12 again.

Claims (3)

What is claimed is:
1. An adjustable coupling comprising:
a polygonal axle;
a fixed toggle having a longitudinal shaft mounted around said polygonal axle and prohibited from rotary motion relative to said polygonal axle, and an axle housing perpendicularly connected to the longitudinal shaft of said fixed toggle for holding a frame rod;
a first movable toggle freely rotated about the longitudinal shaft of said fixed toggle at one end, having a crown gear at an outer end and an axle housing disposed in a radial direction relative to the longitudinal shaft of said fixed toggle for receiving a frame rod;
a second movable toggle freely rotated about the longitudinal shaft of said fixed toggle at an opposite end, having a crown gear at an outer end and an axle housing disposed in a radial direction relative to the longitudinal shaft of said fixed toggle for receiving a frame rod;
two locating members respectively mounted around said axle, each locating member positioned adjacent a respective movable toggle and prohibited from rotary motion relative to said axle, each locating member having a crown gear respectively;
two cam holders respectively fastened to said axle at opposite ends of said axle and prohibited from rotary motion relative to said axle, each cam holder having a projecting portion at an inner side;
two mushroom cams respectively freely rotated about said axle and received within said cam holders, each mushroom cam having a projecting portion respectively axially positioned between said projecting portions of said cam holders for forcing said crown gears of said locating members to mesh with said crown gears of said movable toggles;
spring means respectively mounted around said axle and stopped between said locating members and said movable toggles; and
wherein said locating members can be disengaged from said movable toggles by turning said mushroom cam to move the projecting portions of said mushroom cam away from the projecting portions of said cam plate holders, for allowing said movable toggles to be freely rotated about the longitudinal shaft of said fixed toggle to change the angular positions of the axle housings of said movable toggles relative to said axle.
2. The adjustable coupling of claim 1 wherein said spring means are coiled springs.
3. The adjustable coupling of claim 1 wherein said mushroom cams have a respective handle extended out of said cam holders for turning by hand.
US08/324,463 1994-09-19 1994-09-19 Adjustable coupling Expired - Fee Related US5520474A (en)

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Cited By (58)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5765958A (en) * 1997-03-17 1998-06-16 Lan; Red Pivot joint for a stroller frame
US5827005A (en) * 1997-02-18 1998-10-27 Liu; Yang-Ting Elbow joint assembly
US5867911A (en) * 1997-07-23 1999-02-09 Mcculloch Corporation Apparatus for adjusting relative positions of first and second members
US6086284A (en) * 1998-03-26 2000-07-11 Callahan; Peter Locking hub
US6128800A (en) * 1998-07-10 2000-10-10 Quickie Manufacturing Corporation Rotatable brush head
US6135476A (en) * 1998-11-13 2000-10-24 Sunrise Medical Hhg Inc. Wheelchair seat support bracket
WO2001019228A1 (en) * 1999-09-15 2001-03-22 The Chamberlain Group, Inc. Power tool adjustable handle assembly
US6394687B1 (en) * 1999-06-29 2002-05-28 Mitac International Corp. Rotating shaft unit with two shaft sections which can be located selectively at a relative angular position
US6409411B1 (en) 1999-12-13 2002-06-25 Norgren Automotive, Inc. Modular tooling coupling apparatus
US6422585B1 (en) * 2001-01-09 2002-07-23 James L. Glass Visual alignment aid for connecting trailers
US6536300B1 (en) * 2001-07-18 2003-03-25 Brunswick Corporation Adjustable foot pedal apparatus
US6565156B1 (en) * 1999-02-03 2003-05-20 Koyo Giken Co., Ltd. Angle adjusting device
US6598544B2 (en) 2001-05-17 2003-07-29 Mity-Lite, Inc. Locking mechanism for folding legs
US20030160432A1 (en) * 2001-06-15 2003-08-28 Wonderland Nursery Goods, Co., Ltd. One hand pull collapsible stroller
US6619872B2 (en) 1999-12-13 2003-09-16 Norgren Automotive, Inc. Modular tooling coupling apparatus
US20030178881A1 (en) * 2002-02-11 2003-09-25 Holdampf Carl J. Head restraint pivot latch
US20040129497A1 (en) * 2002-05-28 2004-07-08 Yoram Weiss Ladder assemblies
US6805513B2 (en) * 2000-01-17 2004-10-19 Grupo Antolin-Ingenieria, S.A. Mechanism for regulating collapsible elements
US20050153637A1 (en) * 2003-11-03 2005-07-14 John Clayton Janson Power tool adjustable handle assembly
US20050238419A1 (en) * 2002-01-18 2005-10-27 Fiskars Danmark A/S Shaft for a manually operated tool and a tool
US20050247243A1 (en) * 2001-05-17 2005-11-10 Laws David J Locking mechanism for folding legs
US20060096770A1 (en) * 2004-11-10 2006-05-11 Ana-Maria Roberts Knuckle joint and release/locking mechanism therefor
US20080143081A1 (en) * 2003-05-05 2008-06-19 Dynamic Brands, Llc Folding baby stroller system and method
US20080148519A1 (en) * 2007-01-08 2008-06-26 Chih-Ching Chang Hinge assembly
WO2008130908A2 (en) * 2007-04-16 2008-10-30 Franklin Ronald D Tool positioning system
US7451673B1 (en) 2007-08-15 2008-11-18 Snap-On Incorporated Indexable pliers-type tool
US20090101765A1 (en) * 2007-10-05 2009-04-23 Panduit Corp. Stackable Mount Assembly Including Indexing/Locking Features
US20090121455A1 (en) * 2007-09-19 2009-05-14 Oliver Kretschmer Jogger
US20090265943A1 (en) * 2008-01-31 2009-10-29 Black & Decker Inc. Portable Band Saw
US20100117315A1 (en) * 2008-11-07 2010-05-13 Excellerate Enterprise Co., Ltd. Backrest recline adjustment device for a stroller
US20110011991A1 (en) * 2008-11-19 2011-01-20 Ki-Beom Lee Height adjustment apparatus
US20110114803A1 (en) * 2009-11-17 2011-05-19 Galemed Corporation Circuit support apparatus for medical use and pivot mechanism thereof
US20110149582A1 (en) * 2009-12-22 2011-06-23 Musco Corporation Apparatus, method, and system for adjustably affixing lighting fixtures to structures
US8029059B2 (en) 2008-12-24 2011-10-04 Mity-Lite, Inc. Folding and stacking mesh chair system
USD648554S1 (en) 2009-11-04 2011-11-15 Mity-Lite, Inc. Mesh stacking chair
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USD660612S1 (en) 2010-11-16 2012-05-29 Mity-Lite, Inc. Mesh banquet chair
WO2012109351A1 (en) * 2011-02-08 2012-08-16 Norgren Automation Solutions, Inc. Modular tooling apparatus having serrated teeth for orbital and linear adjustment
US8317269B2 (en) 2008-12-24 2012-11-27 Mity-Lite, Inc. Mesh stacking chair
US8322787B2 (en) 2008-12-24 2012-12-04 Mity-Lite, Inc. Clamping joint for a chair
US20130026734A1 (en) * 2010-11-26 2013-01-31 Shanghai Magic Wheels Sporting Goods Co., Ltd. Scooter with folding device and folding device
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CN103671474A (en) * 2013-12-13 2014-03-26 江苏大学 Angle adjuster with knob switch
CN104389967A (en) * 2014-08-27 2015-03-04 李俊华 Mechanical multistage output mechanism and application thereof
US20150089814A1 (en) * 2013-10-02 2015-04-02 Brett Marut Shaving Apparatus
US9095946B2 (en) 2011-02-08 2015-08-04 Norgren Automation Solutions, Llc Modular tooling apparatus having serrated teeth for orbital and linear adjustment
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US9557002B2 (en) 2014-06-18 2017-01-31 Helping Hands International Holdings Limited Convertible stand/table
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USD814692S1 (en) 2016-11-25 2018-04-03 Musco Corporation Adjustable armature including pivotable knuckle
USD868855S1 (en) 2018-03-13 2019-12-03 Automation Services, Llc Fixture bar clamp
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FR25356E (en) * 1921-09-09 1923-03-06 Car and airplane windshield joint locking system
US2593368A (en) * 1945-09-05 1952-04-15 Verderber Joseph Adjustable golf club
US5018405A (en) * 1990-08-02 1991-05-28 Sunshon Molding Co., Ltd. Angle adjustment device for handle of stroller
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Cited By (91)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5827005A (en) * 1997-02-18 1998-10-27 Liu; Yang-Ting Elbow joint assembly
US5765958A (en) * 1997-03-17 1998-06-16 Lan; Red Pivot joint for a stroller frame
US5867911A (en) * 1997-07-23 1999-02-09 Mcculloch Corporation Apparatus for adjusting relative positions of first and second members
US6086284A (en) * 1998-03-26 2000-07-11 Callahan; Peter Locking hub
US6128800A (en) * 1998-07-10 2000-10-10 Quickie Manufacturing Corporation Rotatable brush head
US6135476A (en) * 1998-11-13 2000-10-24 Sunrise Medical Hhg Inc. Wheelchair seat support bracket
US6565156B1 (en) * 1999-02-03 2003-05-20 Koyo Giken Co., Ltd. Angle adjusting device
US6394687B1 (en) * 1999-06-29 2002-05-28 Mitac International Corp. Rotating shaft unit with two shaft sections which can be located selectively at a relative angular position
US6499172B1 (en) * 1999-09-15 2002-12-31 Wmh Tool Group, Inc. Power tool adjustable handle assembly
WO2001019228A1 (en) * 1999-09-15 2001-03-22 The Chamberlain Group, Inc. Power tool adjustable handle assembly
US6409411B1 (en) 1999-12-13 2002-06-25 Norgren Automotive, Inc. Modular tooling coupling apparatus
US6619872B2 (en) 1999-12-13 2003-09-16 Norgren Automotive, Inc. Modular tooling coupling apparatus
US6805513B2 (en) * 2000-01-17 2004-10-19 Grupo Antolin-Ingenieria, S.A. Mechanism for regulating collapsible elements
US6422585B1 (en) * 2001-01-09 2002-07-23 James L. Glass Visual alignment aid for connecting trailers
US6598544B2 (en) 2001-05-17 2003-07-29 Mity-Lite, Inc. Locking mechanism for folding legs
US20050247243A1 (en) * 2001-05-17 2005-11-10 Laws David J Locking mechanism for folding legs
US7107915B2 (en) 2001-05-17 2006-09-19 Mity-Lite, Inc. Locking mechanism for folding legs
US20030160432A1 (en) * 2001-06-15 2003-08-28 Wonderland Nursery Goods, Co., Ltd. One hand pull collapsible stroller
US6910708B2 (en) * 2001-06-15 2005-06-28 Wonderland Nurseygoods Co., Ltd.. One hand pull collapsible stroller
US6536300B1 (en) * 2001-07-18 2003-03-25 Brunswick Corporation Adjustable foot pedal apparatus
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